We’ll start with a magic ring. Make 6 sc in the ring.
Pull the yarn tail and close the ring.

Join with slip stitch to the first sc.
Now, we’re going to make a Popcorn stitch, so make ch-3 (counts as dc)

Make 4 dc in the same space.
Now, drop the loop from your hook. Insert your hook from front to back into the space between the initial ch-3 and the first dc, then grab the dropped loop with the hook,

and pull it through the stitch. We’ve just made our first Popcorn stitch!
Now, make ch-4;

Make 5 dc in the next sc.
Drop the loop from your hook. Now, look at the picture to see where you should insert your hook. It’s the first dc of the group of 5 dc.

Insert your hook from front to back through the first dc, grab the dropped loop,
and pull it through the stitch.
* Make ch-4, then Popcorn in the next sc.
Repeat from * three more times;
Make ch-4 and join with slip st to the top of the beginning Popcorn. Fasten off.
Now, we’re going to make a Cluster stitch – dc3tog (double crochet three together), so insert a new color in any ch-4 space, and make ch-3 (counts as dc);

Make an “incomplete” dc – yarn over, insert hook in the same chain-4 space, yarn over and pull up loop (you should have 3 loops on hook), yarn over, draw the yarn through 2 loops on the hook – now stop. You should have 2 loops on the hook.
Make another “incomplete” dc in the same space. you should have 3 loops on the hook.

To complete Cluster stitch, yarn over and draw the yarn through all 3 loops on the hook.
Now, we’re going to make another Cluster (dc3tog) in the same ch-4 space, so make ch-3;

Make 3 “incomplete” dc in the same space (now, you should have 4 loops on your hook);
Grab the yarn with the hook and pull it through all 4 loops on the hook.

Make ch-3, then 2 Clusters in the next ch-4 space with ch-3 between them.
Continue making two Clusters into every ch-4 space, with ch-3 between each cluster.

When you reach the beginning of the round join with slip st to the top of beginning Cluster. Fasten off.
Insert a new color in any ch-3 space, and make ch-3 (counts as dc);

Make dc in the same space.
Make 2 dc in the next ch-3 space, ch-2, 2 dc in the same space;

Make 3 dc in the next space;
* Make (2 dc, ch-2, 2 dc) in the next space, 3 dc in the next space;

Repeat from * three more times;
Make (2 dc, ch-2, 2 dc) in the next space;

Make dc in the next space (where we’ve already made ch-3 and dc);
We will finish the hexagon with an invisible join. Cut the yarn and pull it through the stitch. Thread the tapestry needle, skip the beginning ch-3 (marked by arrow in the picture), and insert your needle below both loops of the next dc, from back to front, and pull it through.

Insert the needle back, in the last dc you made – through the back loop only, from front to back, and pull it through. Weave in yarn end.
The join is invisible. Isn’t it?